1. Blue Morpho Dorsal Ventral

2. Electron Microscope Images
Blue colored side (dorsal) of wing

3. Electron Microscope Images
Blue colored side (dorsal) of wing

4. Electron Microscope Images
Brown colored underside (ventral) of wing

5. Electron Microscope Images: Brown vs. Blue
Blue Scales
Brown Scales

6. Electron Microscope Images: Brown vs. Blue
Blue Scales
Brown Scales

7. A Few Selections from Mason’s 7 Criteria for Structural Color
Color shifts are observed with changes in pressure, distortion, swelling and shrinking of tissue.
Color is impervious to bleaching agents, and only responds to reagents that cause shrinking, swelling, or other physical changed in the tissue.
Iridescence is usually observed in some form.